Introduction: Peritonitis is the inflammation of peritonitum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs. Peritonitis may be localized or generalized, and may result from infection or from a non-infectious process. Case presentation: We present a case of a 21 years-old female patient with postpartum peritonitis who was admitted in the hospital. The diagnosis concluded with intestinal obstruction, fluid leakage along with bacterial and fungal infection. A successful laparotomy was performed. The patient was injected with different antibiotics, supplement and pre-operative and post-operative drugs. The patient is still admitted in the hospital and under observation. Conclusion: The patient is still under observation and is recovering fast after the surgery and medication. Our case report emphasizes that negligence of the physician while diagnosing can lead to severity of the disease and proper medical care is required during delivery to avoid postpartum infections.